An Oklahoma City girl who says she asks everyone she meets to buy Girl Scout cookies has broken the organization’s decades-old sales record by a margin about the size of a Thin Mint.

Katie Francis of Oklahoma City sold 18,107 boxes in the seven-week sales period that ended Sunday night. The previous mark was set by Elizabeth Brinton, who sold approximately 18,000 one year in the 1980s.

The sixth-grade student told The Oklahoman newspaper last month that there were only three ingredients needed to rack up large sales: a lot of time, a lot of commitment and asking everyone she met to buy.